I think that a certain amount of money is a must for happiness
but not everyone feels happy because they have a lot of money

I think that a certain amount of money is necessary to be happy but not everyone who has much money is happy.
이렇게 하시는 것이 더 자연스러울꺼 같네요.. 문법적으로도..
madmagazine님께 딴지 였다면... 죄송합니다..^^

(I tink that) A ertain amount of money is necessary for happiness but not in all case.
이렇게도 할수가 있죠^^

r감사합니다^^//